【摘要】 研究不同分散介质和分散剂对TiO2和SiO2-Ag混合纳米粉体在水溶液中分散的影响,采用分散相的沉降高度和分散后颗粒的粒度分布评价分散效果,得出(NaPO3)6是TiO2和SiO2-Ag粉体的良好分散剂.通过测定分散相在分散介质中ζ电位,分析分散剂的分散机制,(NaPO3)6可分别显著提高水溶液分散中TiO2和SiO2-Ag粉体表面ζ电位的绝对值,使超细混合粉体在水溶液中获得良好稳定的分散.更多还原

【Abstract】 The effects of dispersant on dispersion of nano TiO2 and SiO2-Ag particles are investigated respectively.The sedimentation height and the size distribution of the dispersed particles in aqueous solution are employed to characterize the particle dispersion.The experimental results show that sodium hexametaphosphate is efficient dispersant for TiO2 and SiO2-Ag particles in aqueous solution.The zeta potential of the particles in aqueous solution is measured to analyze the dispersion mechanism since sodium hexametaphosphate can significantly increase the absolute value of zeta potential of particles.Thus satisfactory and stable dispersion of TiO2 and SiO2-Ag in aqueous solution is obtained.更多还原